Answer:
Mass of person, M = 50 kg ; Mass of case, m = 10 kg; \[h=4\,\,m;\,\,g=9.8\,\,m/{{s}^{2}}\] Work done, W = ? \[W=Total\,\,mass\times g\times h\] \[=(M+m)gh\] \[=(50+10)\times 9.8\times 4\] \[=2352\,\,J\]
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